TGFB and DTGFB pyroelectric vidicons

New pyroelectric vidicons (PEVs) have been developed employing targets of tri-glycine fluoroberyllate (TGFB) and deuterated triglycine fluoroberyllate (DTGFB). These tubes provide significant advances in the state-of-the-art of PEV performance. The best performance of PEVs previously reported was a panning-mode minimum resolvable temperature (MRT) of 1°C at 250 television lines/picture height (TVL/PH) with a pedestal current of 100 nA for tubes having triglycine sulfate (TGS) targets and non-crossover guns. Under the same conditions, the PEVs with these new target materials show an MRT of approximately 0.5°C at 250 TVL/PH.